| 摘要 |
PURPOSE: To provide the user authentication system which can select any ciphering/deciphering means or a key managing means at different security levels suitable for the request of a user or terminal equipment. CONSTITUTION: This system is provided with plural ciphering/deciphering means from 14-1 to 14-m corresponding to different security levels, plural key managing means from 15-1 to 15-n corresponding to different security levels, security level storage means 16 for storing the security level for each user or terminal equipment designated in advance, ciphering/deciphering means selecting means 17 for selecting the ciphering/deciphering means from 14-1 to 14-m corresponding to the security levels at the time of ciphering/deciphering processing, and key managing means selecting means 18 for selecting the key managing means from 15-1 to 15-n corresponding to the security levels at the time of key acquisition. Thus, ciphering/deciphering processing or key management suitable for the request of the user or terminal equipment is performed. |
